//阿拉伯数字转中文数字
export function NoToChinese(num) {
  // 还可以有小数点 
  if (!/^\d*(\.\d*)?$/.test(num)) {
    alert("Number is wrong!");
    return "Number is wrong!";
  }
  var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九");
  var BB = new Array("", "十", "百", "千", "万", "亿", "点", "");
  var a = ("" + num).replace(/(^0*)/g, "").split("."),
    k = 0,
    re = "";
  for (var i = a[0].length - 1; i >= 0; i--) {
    switch (k) {
      case 0:
        re = BB[7] + re;
        break;
      case 4:
        if (!new RegExp("0{4}\\d{" + (a[0].length - i - 1) + "}$").test(a[0]))
          re = BB[4] + re;
        break;
      case 8:
        re = BB[5] + re;
        BB[7] = BB[5];
        k = 0;
        break;
    }
    if (k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0) re = AA[0] + re;
    if (a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k % 4] + re;
    k++;
  }
  if (a.length > 1) //加上小数部分(如果有小数部分) 
  {
    re += BB[6];
    for (var i = 0; i < a[1].length; i++) re += AA[a[1].charAt(i)];
  }
  return re;
};

export const jsonp = ({ url, params, callbackName }) => {
  const generateUrl = () => {
    let dataSrc = ''
    for (let key in params) {
      if (params.hasOwnProperty(key)) {
        dataSrc += `${key}=${params[key]}&`
      }
    }
    dataSrc += `callback=${callbackName}`
    return `${url}?${dataSrc}`
  }
  return new Promise((resolve, reject) => {
    const scriptEle = document.createElement('script')
    scriptEle.src = generateUrl()
    document.body.appendChild(scriptEle)
    window[callbackName] = data => {
      resolve(data)
      document.removeChild(scriptEle)
    }
  })
}